derek.holloway
7502bf64a4
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45 lines
2.2 KiB
LLVM
45 lines
2.2 KiB
LLVM
; RUN: opt -passes=gvn -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-p100:128:64:64-p101:128:64:64"
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target triple = "x86_64-unknown-linux-gnu"
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%ArrayImpl = type { i64, ptr addrspace(100), [1 x i64], [1 x i64], [1 x i64], i64, i64, ptr addrspace(100), ptr addrspace(100), i8, i64 }
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%_array = type { i64, ptr addrspace(100), i8 }
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define void @test(i64 %n_chpl) null_pointer_is_valid {
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entry:
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; First section is some code
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%0 = getelementptr inbounds %_array, ptr null, i32 0, i32 1
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%1 = load ptr addrspace(100), ptr %0
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%2 = getelementptr inbounds %ArrayImpl, ptr addrspace(100) %1, i32 0, i32 8
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%3 = load ptr addrspace(100), ptr addrspace(100) %2
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%4 = getelementptr inbounds double, ptr addrspace(100) %3, i64 -1
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; Second section is that code repeated
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%x0 = getelementptr inbounds %_array, ptr null, i32 0, i32 1
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%x1 = load ptr addrspace(100), ptr %x0
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%x2 = getelementptr inbounds %ArrayImpl, ptr addrspace(100) %x1, i32 0, i32 8
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%x3 = load ptr addrspace(100), ptr addrspace(100) %x2
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%x4 = getelementptr inbounds double, ptr addrspace(100) %x3, i64 -1
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; These two stores refer to the same memory location
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; Even so, they are expected to remain separate stores here
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store double 0.000000e+00, ptr addrspace(100) %4
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store double 0.000000e+00, ptr addrspace(100) %x4
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; Third section is the repeated code again, with a later store
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; This third section is necessary to trigger the crash
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%y1 = load ptr addrspace(100), ptr %0
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%y2 = getelementptr inbounds %ArrayImpl, ptr addrspace(100) %y1, i32 0, i32 8
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%y3 = load ptr addrspace(100), ptr addrspace(100) %y2
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%y4 = getelementptr inbounds double, ptr addrspace(100) %y3, i64 -1
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store double 0.000000e+00, ptr addrspace(100) %y4
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ret void
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; CHECK-LABEL: define void @test
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; CHECK: getelementptr inbounds double, ptr addrspace(100) {{%.*}}, i64 -1
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; CHECK-NEXT: store double 0.000000e+00, ptr addrspace(100) [[DST:%.*]]
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; CHECK-NEXT: store double 0.000000e+00, ptr addrspace(100) [[DST]]
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; CHECK: load
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; CHECK: getelementptr inbounds %ArrayImpl, ptr addrspace(100)
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; CHECK: load
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; CHECK: getelementptr inbounds double, ptr addrspace(100) {{%.*}}, i64 -1
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; CHECK: store double 0.000000e+00, ptr addrspace(100)
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; CHECK: ret
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}
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